Re: [PATCH v5] ASoC: Intel: kbl_rt5663_rt5514_max98927: Fix kabylake_ssp_fixup function

On 7/7/20 3:34 AM, Lukasz Majczak wrote:

Fix kabylake_ssp_fixup function to distinguish codecs DAIs by names, as current approach, leads to crash while trying to get snd_soc_dpcm with container_of() macro in kabylake_ssp_fixup(). The crash call path looks as below: soc_pcm_hw_params() snd_soc_dai_hw_params(codec_dai, substream, &codec_params); rtd->dai_link->be_hw_params_fixup(rtd, params) kabylake_ssp_fixup() In this case, codec_params is just a copy of an internal structure and is not embedded into struct snd_soc_dpcm thus we cannot use container_of() on it.

Signed-off-by: Lukasz Majczak lma@semihalf.com Signed-off-by: Harsha Priya harshapriya.n@intel.com

Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com

---

v1 -> v2:

• Extract dmic from SSP0 as every BE should have own fixup function.

v2 -> v3:

• Restore naming in the dapm route table to not confuse with other

drivers

• Fixed indentations

v3 -> v4:

• Updated code and commit description according to

solution proposed by Harsha

.../intel/boards/kbl_rt5663_rt5514_max98927.c | 28 ++++++++----------- 1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c index b34cf6cf11395..df454de40739a 100644 --- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c +++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c @@ -333,36 +333,32 @@ static int kabylake_ssp_fixup(struct snd_soc_pcm_runtime *rtd, { struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);

• struct snd_interval *chan = hw_param_interval(params,

• struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);

• struct snd_soc_dpcm *dpcm = container_of(

• 	params, struct snd_soc_dpcm, hw_params);
  

• struct snd_soc_dai_link *fe_dai_link = dpcm->fe->dai_link;
• struct snd_soc_dai_link *be_dai_link = dpcm->be->dai_link;

• struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);

  /*

  • The ADSP will convert the FE rate to 48k, stereo, 24 bit

  */

• if (!strcmp(fe_dai_link->name, "Kbl Audio Port") ||

•    !strcmp(fe_dai_link->name, "Kbl Audio Headset Playback") ||
  

•    !strcmp(fe_dai_link->name, "Kbl Audio Capture Port")) {
  

• if (!strcmp(codec_dai->name, KBL_REALTEK_DMIC_CODEC_DAI)) {

• if (params_channels(params) == 2 ||
  

• 	DMIC_CH(dmic_constraints) == 2)
  

• 	channels->min = channels->max = 2;
  

• else
  

• 	channels->min = channels->max = 4;
  

• } else { rate->min = rate->max = 48000;

• chan->min = chan->max = 2;
  

• channels->min = channels->max = 2;
  

  snd_mask_none(fmt); snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE);

• } else if (!strcmp(fe_dai_link->name, "Kbl Audio DMIC cap")) {

• if (params_channels(params) == 2 ||
  

• 		DMIC_CH(dmic_constraints) == 2)
  

• 	chan->min = chan->max = 2;
  

• else
  

• 	chan->min = chan->max = 4;
  

  } /*
  • The speaker on the SSP0 supports S16_LE and not S24_LE.
  • thus changing the mask here
  */
• if (!strcmp(be_dai_link->name, "SSP0-Codec"))

• if (!strcmp(codec_dai->name, KBL_MAXIM_CODEC_DAI)) snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);

  return 0;